https://nova.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:13408 qQ_t and the dimensionless hydraulic conductivity index K_D plotted on double logarithmic scales has been proposed for soils ranging from sands to clays. It is demonstrated that these revised relationships can be used to evaluate plausible values of hydraulic conductivity from piezocone sounding records taken at two different clay soil sites in Saga and Yokohama, Japan. The major significance of this work is in extending the range of application of the method first proposed by Elsworth & Lee for sands to almost all soil types. This was possible after appropriate modification of Elsworth and Lee's original method.]]> Wed 11 Apr 2018 10:24:44 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:23678 w, defined as the horizontal effective stress exerted on the wall of the consolidation ring (σ_hw) divided by the vertical effective stress (σ_v) in the soil specimen is suggested as an indicator of the tendency for lateral deformation under field conditions. It is observed that if the value of K_w is close to the value of K₀of the soil (the 'at-rest' earth pressure coefficient), there should be very limited lateral displacement in field situations. The laboratory test results show that during the loading process, the value of K_w is mainly influenced by the ratio of the magnitude of the surcharge pressure to the vacuum pressure (RL) and the rate of surcharge loading (SLR). At the end of the consolidation the value of K_w increases with increasing RL, but it is almost independent of SLR for the conditions investigated. In the presence of a vacuum pressure, at the end of consolidation the value of K_w is usually less than the original value of K₀ of the soil. The test results also indicate that K_w has a strong correlation with the synthetic non-dimensional loading parameter, RLS, as defined by Chai et al. (2013), which includes the effects of RL and SLR as well as the consolidation properties of the soil. It is suggested that the parameter RLS can be used to predict lateral displacements under field conditions that involve combined surcharge and vacuum pressure loading.]]> Sat 24 Mar 2018 07:13:57 AEDT ]]>